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a) myopia or near sightedness further..it is a concave lens
b) power = 1/ focal length
focal length= 1/power
focal length= 1/-4.5
= -2/9 m
c) picture
d) causes are-
1. excessive curvature of length
2. elongation of eyeball
b) power = 1/ focal length
focal length= 1/power
focal length= 1/-4.5
= -2/9 m
c) picture
d) causes are-
1. excessive curvature of length
2. elongation of eyeball
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